CN116164475A - Refrigerator and freezer adopting vacuum pressure swing adsorption nitrogen making device - Google Patents
Refrigerator and freezer adopting vacuum pressure swing adsorption nitrogen making device Download PDFInfo
- Publication number
- CN116164475A CN116164475A CN202310156304.6A CN202310156304A CN116164475A CN 116164475 A CN116164475 A CN 116164475A CN 202310156304 A CN202310156304 A CN 202310156304A CN 116164475 A CN116164475 A CN 116164475A
- Authority
- CN
- China
- Prior art keywords
- refrigerator
- nitrogen
- air
- freezer
- pressure swing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The invention provides a refrigerator and a freezer adopting a vacuum pressure swing adsorption nitrogen making device. Comprising the following steps: the refrigerator and the freezer body are internally provided with a vacuum pressure swing adsorption nitrogen making device which is respectively and electrically connected with the total control system and the pressure sensors; the gas outlet of the oil-free air compressor is connected with the air bin, the air bin is respectively connected with the gas inlets of the two parallel adsorption tanks through the first reversing valve, one gas outlet of the two adsorption tanks is connected with the gas inlet of the nitrogen bin, and the gas outlet of the nitrogen bin is communicated with the inside of the refrigerator and the ice chest body. The refrigerator and the freezer adopting the vacuum pressure swing adsorption nitrogen making device provided by the invention solve the problems that the existing refrigerator and freezer with nitrogen making and fresh keeping functions adopt a pressure swing adsorption nitrogen making machine, only can provide nitrogen, and air in the refrigerator and freezer can not be discharged, so that the nitrogen concentration is difficult to ensure, and the fresh keeping quality of foods is further affected.
Description
Technical Field
The invention relates to the technical field of adsorption nitrogen production, in particular to a refrigerator and a freezer adopting a vacuum pressure swing adsorption nitrogen production device.
Background
The society is continuously developing, and people have higher requirements on food, so that people can not leave various foods such as vegetables, melons, fruits, fish and the like in daily life, and the food needs to be colored, fragrant and tasty and also can be maintained physically. However, at present, the refrigerator and the ice chest are mainly used for preserving food, the method of low-temperature refrigeration by the refrigerator and the ice chest is not ideal, and for leaf vegetables and melons and fruits, the low temperature of about zero ℃ can cause the leaf vegetables and the melons and fruits to lose the original taste and nutrition, and the skin is wrinkled and streaked.
Nitrogen is an inert, colorless, nontoxic and odorless gas, does not react with food chemically, can effectively slow down oxidative deterioration and decay of food, so that food is fresh-keeping, however, the existing refrigerator and freezer with nitrogen-making fresh-keeping function adopts a pressure swing adsorption nitrogen-making machine, only can provide nitrogen, can not discharge air in the refrigerator and freezer, and the concentration of nitrogen is difficult to ensure, thereby affecting the fresh-keeping quality of food.
In combination, the existing refrigerator and freezer with nitrogen making and fresh keeping functions adopts a pressure swing adsorption nitrogen making machine, only can provide nitrogen, and cannot exhaust air in the refrigerator and freezer, so that the nitrogen concentration is difficult to guarantee, and further the fresh keeping quality of foods is affected.
Disclosure of Invention
In order to solve the problems, the invention provides a refrigerator and a freezer adopting a vacuum pressure swing adsorption nitrogen making device to solve the problems set forth in the background art.
According to a first aspect of the present invention, there is provided a refrigerator or freezer employing a vacuum pressure swing adsorption nitrogen making apparatus, comprising: the refrigerator and the freezer body are internally provided with a total control system and a plurality of pressure sensors, and the total control system is respectively and electrically connected with the plurality of pressure sensors; the vacuum pressure swing adsorption nitrogen making device is arranged in the refrigerator body and is electrically connected with the main control system and the pressure sensors respectively; the vacuum pressure swing adsorption nitrogen production device comprises an oilless air compressor, an air bin, two adsorption tanks and a nitrogen bin; the air outlet of the oil-free air compressor is connected with an air bin, the air bin is respectively connected with the air inlets of two adsorption tanks connected in parallel through a first reversing valve, one air outlet of the two adsorption tanks is connected with the air inlet of a nitrogen bin, and the air outlet of the nitrogen bin is communicated with the inside of the refrigerator and the refrigerator body.
Optionally, the refrigerator, the inside of refrigerator-freezer body are equipped with a plurality of cold-stored rooms, and the inside of a plurality of cold-stored rooms is equipped with a pressure sensor respectively, and the gas outlet in nitrogen gas storehouse communicates with the inside of a plurality of cold-stored rooms respectively through the second switching-over valve.
Optionally, the second reversing valve is respectively communicated with the interiors of the refrigerating chambers through a plurality of nitrogen pipelines, and the nitrogen pipelines are all positioned at the upper ends of the refrigerating chambers corresponding to the nitrogen pipelines.
Optionally, the oil-free air compressor comprises a compression mechanism and a vacuumizing mechanism; the air inlet of the compression mechanism is connected with outside air, the air outlet of the compression mechanism is connected with the air bin, and the air inlet of the vacuumizing mechanism is communicated with the inside of the refrigerating chambers.
Optionally, the air inlet of the vacuumizing mechanism is communicated with the interiors of the plurality of refrigerating chambers through a third reversing valve.
Optionally, the third reversing valve is respectively communicated with the interiors of the refrigerating chambers through a plurality of mixed gas pipelines, and the mixed gas pipelines are all positioned at the lower ends of the refrigerating chambers corresponding to the mixed gas pipelines.
Optionally, a first one-way valve and a second one-way valve are respectively arranged on a pipeline of one air outlet of the two adsorption tanks, and the two adsorption tanks are respectively communicated with the nitrogen bin through the first one-way valve and the second one-way valve.
Optionally, the vacuum pressure swing adsorption nitrogen making device further comprises: an oxygen-enriched recovery tank,
the other air outlet of the two parallel adsorption tanks is connected with the oxygen-enriched recovery tank through two oxygen pipelines respectively.
Optionally, two oxygen pipelines are respectively provided with a check valve.
According to the refrigerator and the refrigerator adopting the vacuum pressure swing adsorption nitrogen making device, the refrigerator body, the vacuum pressure swing adsorption nitrogen making device and the plurality of pressure sensors are controlled through the main control system, external air enters the oil-free air compressor from one air inlet of the oil-free air compressor, compressed air enters the air bin through the air outlet, air enters one of the adsorption tanks from the air bin through the first reversing valve, nitrogen is separated, meanwhile, the inside of the other adsorption tank is desorbed, nitrogen enters the nitrogen bin from one air outlet of the adsorption tank after nitrogen is separated, after the refrigerator door and the refrigerator door are opened, the refrigerator door and the refrigerator door are closed, at the moment, the values of the pressure sensors are changed, the main control system controls the nitrogen in the nitrogen bin to enter the refrigerator body and the refrigerator body, meanwhile, the other air inlet of the oil-free air compressor pumps out mixed gas in the refrigerator body and the refrigerator body until the values of the pressure sensors reach standard values, at the moment, the nitrogen concentration in the refrigerator body and the refrigerator body can be ensured, the problem that the existing refrigerator and the refrigerator with the nitrogen making function and the refrigerator adopting the pressure swing adsorption nitrogen making device can only provide nitrogen, the refrigerator and the refrigerator door are exhausted, and the fresh-keeping of the nitrogen concentration is difficult to be guaranteed, and the fresh-keeping of foods cannot be guaranteed.
Drawings
FIG. 1 is a schematic diagram of a system for a refrigerator or freezer employing a vacuum pressure swing adsorption nitrogen making apparatus according to the present invention;
fig. 2 is a schematic structural diagram of a refrigerator and a freezer employing a vacuum pressure swing adsorption nitrogen making device according to the present invention.
List of reference numerals:
10. a refrigerator and ice chest body; 11. a general control system; 12. a pressure sensor; 20. vacuum pressure swing adsorption nitrogen making device; 21. an oil-free air compressor; 210. a compression mechanism; 211. a vacuum pumping mechanism; 22. an air bin; 23. an adsorption tank; 24. a nitrogen bin; 25. a first reversing valve; 26. a second reversing valve; 27. a third reversing valve; 28. a first one-way valve; 29. a second one-way valve; 30. an oxygen-enriched recovery tank; 31. a check valve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 to 2, the invention provides a refrigerator and a freezer adopting a vacuum pressure swing adsorption nitrogen making device, which can solve the problems that the existing refrigerator and freezer with nitrogen making and fresh keeping functions adopts a pressure swing adsorption nitrogen making machine, only can provide nitrogen, and can not discharge air in the refrigerator and freezer, so that the nitrogen concentration is difficult to ensure, and further the fresh keeping quality of foods is affected.
The invention provides a refrigerator and a freezer adopting a vacuum pressure swing adsorption nitrogen making device, which comprises a refrigerator, a freezer body 10 and a vacuum pressure swing adsorption nitrogen making device 20, wherein a total control system 11 and a plurality of pressure sensors 12 are arranged in the refrigerator and the freezer body 10, and the total control system 11 is respectively and electrically connected with the plurality of pressure sensors 12; the refrigerator and the freezer body 10 are internally provided with a vacuum pressure swing adsorption nitrogen making device 20, and the vacuum pressure swing adsorption nitrogen making device 20 is respectively and electrically connected with a total control system 11 and a plurality of pressure sensors 12; the vacuum pressure swing adsorption nitrogen making device 20 comprises an oil-free air compressor 21, an air bin 22, two adsorption tanks 23 and a nitrogen bin 24; one air inlet of the oilless air compressor 21 is connected with external air, the other air inlet of the oilless air compressor 21 is communicated with the refrigerator and the refrigerator body 10, the air outlet of the oilless air compressor 21 is connected with the air bin 22, the air bin 22 is respectively connected with the air inlets of the two adsorption tanks 23 which are connected in parallel through the first reversing valve 25, one air outlet of the two adsorption tanks 23 is connected with the air inlet of the nitrogen bin 24, and the air outlet of the nitrogen bin 24 is communicated with the refrigerator and the refrigerator body 10.
Wherein, the inside of the two parallel adsorption tanks 23 is provided with a carbon molecular sieve, and nitrogen is prepared by using the carbon molecular sieve. The refrigerator, freezer body 10 is a domestic refrigerator, freezer or a commercial refrigerator, freezer.
According to the refrigerator and the refrigerator adopting the vacuum pressure swing adsorption nitrogen production device, the refrigerator body 10, the vacuum pressure swing adsorption nitrogen production device 20 and the plurality of pressure sensors 12 are controlled through the total control system 11, external air enters the oil-free air compressor 21 from one air inlet of the oil-free air compressor 21, compressed air enters the air bin 22 through the air outlet, the air enters one of the adsorption tanks 23 from the air bin 22 through the first reversing valve 25 in a switching manner and nitrogen is separated, meanwhile, the interior of the other adsorption tank 23 is desorbed, after nitrogen is separated, the nitrogen enters the nitrogen bin 24 from one air outlet of the adsorption tank 23, after the refrigerator and the refrigerator door are opened, the refrigerator door is closed, at the moment, the value of the pressure sensor 12 is changed, the total control system 11 controls the nitrogen in the nitrogen bin 24 to enter the refrigerator and the refrigerator body 10, meanwhile, the other air inlet of the oil-free air compressor 21 pumps out mixed gas in the refrigerator and the refrigerator body 10 until the value of the pressure sensor 12 reaches the standard value, and the nitrogen concentration in the refrigerator and the refrigerator body 10 can be guaranteed, and the fresh-keeping quality of the refrigerator and the refrigerator can not be guaranteed due to the fact that the existing refrigerator and the refrigerator with the nitrogen is exhausted by adopting the nitrogen adsorption function, and the fresh-keeping function can not be guaranteed, and the fresh-keeping quality of the fresh-keeping can not be guaranteed.
Referring to fig. 1 to 2, alternatively, the refrigerator and the ice chest body 10 are provided with a plurality of refrigerating chambers inside, one pressure sensor 12 is respectively arranged inside the plurality of refrigerating chambers, and the air outlet of the nitrogen bin 24 is respectively communicated with the inside of the plurality of refrigerating chambers through a second reversing valve 26.
According to the value (indicating the nitrogen concentration) of the pressure sensor 12 in each refrigerating chamber, when the nitrogen concentration in the refrigerating chamber is low, the total control system 11 controls the second reversing valve 26 to charge the nitrogen in the nitrogen bin 24 into the refrigerating chamber corresponding to the second reversing valve.
Referring to fig. 1 to 2, alternatively, the second reversing valve 26 communicates with the interiors of the plurality of refrigerating chambers through a plurality of nitrogen lines, respectively, each of which is located at the upper end of the corresponding refrigerating chamber.
Wherein, the plurality of nitrogen pipelines are arranged at the upper end of the refrigerating chamber corresponding to the nitrogen pipelines because the density of the nitrogen is less than that of the oxygen.
Referring to fig. 1 to 2, the oil-free air compressor 21 optionally includes a compression mechanism 210 and a vacuum mechanism 211; the air inlet of the compression mechanism 210 is connected with the outside air, the air outlet of the compression mechanism 210 is connected with the air bin 22, and the air inlet of the vacuumizing mechanism 211 is communicated with the interiors of the refrigerating chambers.
The oil-free air compressor 21 of the present invention includes a compression mechanism 210 and a vacuum mechanism 211, and can compress air by the compression mechanism 210 and charge the air into the air compartment 22, and can draw out the mixture inside the refrigerating compartment by the vacuum mechanism 211.
Referring to fig. 1 to 2, alternatively, the air inlet of the evacuation mechanism 211 communicates with the interiors of the plurality of refrigerating chambers through the third direction valve 27.
Wherein, according to the value of the pressure sensor 12 in each refrigerating chamber, the total control system 11 controls the third reversing valve 27 to extract the mixed gas in the refrigerating chamber from the refrigerating chamber, the invention can not extract the mixed gas in a plurality of refrigerating chambers at the same time, only the mixed gas in one refrigerating chamber can be extracted, and then the mixed gas in the next refrigerating chamber can be extracted.
Referring to fig. 1 to 2, optionally, the third reversing valve 27 is respectively communicated with the interiors of the plurality of refrigerating chambers through a plurality of mixed gas pipelines, and the plurality of mixed gas pipelines are positioned at the lower ends of the refrigerating chambers corresponding to the plurality of mixed gas pipelines.
Wherein, the plurality of mixed gas pipelines are arranged at the lower end of the refrigerating chamber corresponding to the mixed gas pipelines because the density of the nitrogen is less than that of the oxygen.
Referring to fig. 1 to 2, alternatively, a first check valve 28 and a second check valve 29 are respectively provided on a pipeline of one air outlet of the two adsorption tanks 23, and the two adsorption tanks 23 are respectively communicated with the nitrogen bin 24 through the first check valve 28 and the second check valve 29.
Wherein the first check valve 28 and the second check valve 29 are provided to prevent the nitrogen gas from flowing back into the canister 23.
Referring to fig. 1 to 2, optionally, the vacuum pressure swing adsorption nitrogen generation apparatus 20 further includes: an oxygen-enriched recovery tank 30,
the other air outlets of the two parallel adsorption tanks 23 are respectively connected with the oxygen enrichment recovery tank 30 through two oxygen pipelines.
Wherein, when the oxygen concentration inside two adsorption tanks 23 is too high, oxygen is inflammable, so that an oxygen-enriched recovery tank 30 is provided, when one adsorption tank 23 adsorbs oxygen, the other adsorption tank 23 desorbs the carbon molecular sieve which is adsorbed, and discharges the desorbed oxygen into the oxygen-enriched recovery tank 30. And the air outlet of the oxygen-enriched recovery tank 30 is connected to the outside atmosphere.
Referring to fig. 1 to 2, one check valve 31 is optionally provided on each of the two oxygen lines.
Wherein the check valve 31 is provided to prevent the back flow of oxygen into the canister 23.
Working principle: the refrigerator and the freezer adopting the vacuum pressure swing adsorption nitrogen making device start to operate, air enters the compression mechanism 210 and is compressed, compressed air enters the air bin 22, the first reversing valve 25 is switched to charge the compressed air into one of the adsorption tanks 23, the adsorption tank 23 separates out nitrogen through molecular sieves arranged in the adsorption tank, the first one-way valve 28 or the second one-way valve 29 is opened, the nitrogen enters the nitrogen bin 24, the second reversing valve 26 is switched to charge the nitrogen into the corresponding refrigerating chamber according to the numerical value of the pressure sensor 12 arranged in the refrigerating chamber in the refrigerator and the freezer body 10, meanwhile, the third reversing valve 27 is switched, the vacuumizing mechanism 211 pumps out mixed gas in the refrigerating chamber filled with the nitrogen until the nitrogen concentration in the refrigerating chamber reaches the standard, and then the nitrogen in the next refrigerating chamber and the mixed gas are pumped out.
In summary, the refrigerator and the refrigerator adopting the vacuum pressure swing adsorption nitrogen making device provided by the invention are characterized in that the total control system 11 is used for controlling the refrigerator and the refrigerator body 10, the vacuum pressure swing adsorption nitrogen making device 20 and the plurality of pressure sensors 12, external air enters the oil-free air compressor 21 from one air inlet of the oil-free air compressor 21, compressed air enters the air bin 22 through the air outlet, the air enters one of the adsorption tanks 23 and nitrogen is separated from the air bin 22 through the first reversing valve 25, meanwhile, the inside of the other adsorption tank 23 is desorbed, after the nitrogen is separated, the nitrogen enters the nitrogen bin 24 from one air outlet of the adsorption tank 23, after the refrigerator and the refrigerator door are opened, the refrigerator door is closed, at the moment, the numerical value of the pressure sensor 12 is changed, the total control system 11 is used for controlling the nitrogen in the nitrogen bin 24 to enter the refrigerator and the refrigerator body 10, and at the same time, the other air inlet of the oil-free air compressor 21 is used for pumping out mixed gas in the refrigerator and the refrigerator body 10 until the numerical value of the pressure sensor 12 reaches the standard value, and the nitrogen concentration in the refrigerator and the refrigerator body 10 is guaranteed, after the nitrogen is exhausted from the refrigerator and the refrigerator with the existing refrigerator and the refrigerator with the nitrogen having the adsorption function, and the fresh-keeping function can not be guaranteed, and the fresh-keeping quality can not be guaranteed.
It should be noted that not all the steps and modules in the above flowcharts and the system configuration diagrams are necessary, and some steps or modules may be omitted according to actual needs. The execution sequence of the steps is not fixed and can be adjusted as required. The system structure described in the above embodiments may be a physical structure or a logical structure, that is, some modules may be implemented by the same physical entity, or some modules may be implemented by multiple physical entities, or may be implemented jointly by some components in multiple independent devices.
In the above embodiments, the hardware module may be mechanically or electrically implemented. For example, a hardware module may include permanently dedicated circuitry or logic (e.g., a dedicated processor, FPGA, or ASIC) to perform the corresponding operations. The hardware modules may also include programmable logic or circuitry (e.g., a general-purpose processor or other programmable processor) that may be temporarily configured by software to perform the corresponding operations. The particular implementation (mechanical, or dedicated permanent, or temporarily set) may be determined based on cost and time considerations.
While the invention has been illustrated and described in detail in the drawings and in the preferred embodiments, the invention is not limited to the disclosed embodiments, and it will be appreciated by those skilled in the art that the code audits of the various embodiments described above may be combined to produce further embodiments of the invention, which are also within the scope of the invention.
Claims (9)
1. A refrigerator or freezer employing a vacuum pressure swing adsorption nitrogen making apparatus, comprising:
the refrigerator and freezer body (10) is internally provided with a total control system (11) and a plurality of pressure sensors (12), and the total control system (11) is respectively and electrically connected with the pressure sensors (12);
the vacuum pressure swing adsorption nitrogen making device (20) is arranged in the refrigerator and freezer body (10), the vacuum pressure swing adsorption nitrogen making device (20) is electrically connected with the total control system (11) and the pressure sensors (12) respectively;
the vacuum pressure swing adsorption nitrogen production device (20) comprises an oil-free air compressor (21), an air bin (22), two adsorption tanks (23) and a nitrogen bin (24);
the utility model discloses a refrigerator, refrigerator body, including refrigerator body, air-tight, outside air is connected to an air inlet of air-tight compressor (21), another air inlet of air-tight compressor (21) with the inside intercommunication of refrigerator, refrigerator body (10), the gas outlet of air-tight air compressor (21) with air storehouse (22) are connected, air storehouse (22) are connected with the air inlet of two parallelly connected adsorption tanks (23) respectively through first switching-over valve (25), two an gas outlet of adsorption tanks (23) all with the air inlet of nitrogen gas storehouse (24) is connected, the gas outlet of nitrogen gas storehouse (24) with the inside intercommunication of refrigerator, refrigerator body (10).
2. The refrigerator and freezer adopting the vacuum pressure swing adsorption nitrogen making device according to claim 1, wherein a plurality of refrigerating chambers are arranged in the refrigerator and freezer body (10), one pressure sensor (12) is respectively arranged in each refrigerating chamber, and the air outlet of the nitrogen bin (24) is respectively communicated with the interior of each refrigerating chamber through a second reversing valve (26).
3. The refrigerator or freezer employing the vacuum pressure swing adsorption nitrogen making apparatus according to claim 2, wherein the second reversing valve (26) is respectively communicated with the insides of the plurality of refrigerating chambers through a plurality of nitrogen pipelines, and the plurality of nitrogen pipelines are all positioned at the upper ends of the refrigerating chambers corresponding to the nitrogen pipelines.
4. A refrigerator or freezer employing a vacuum pressure swing adsorption nitrogen generating apparatus according to claim 3, wherein the oil-free air compressor (21) comprises a compression mechanism (210) and a vacuum pumping mechanism (211); the air inlet of the compression mechanism (210) is connected with outside air, the air outlet of the compression mechanism (210) is connected with the air bin (22), and the air inlet of the vacuumizing mechanism (211) is communicated with the interiors of the refrigerating chambers.
5. The refrigerator or freezer employing the vacuum pressure swing adsorption nitrogen making apparatus according to claim 4, wherein the air inlet of the vacuum pumping mechanism (211) communicates with the insides of the plurality of refrigerating chambers through a third reversing valve (27).
6. The refrigerator or freezer employing the vacuum pressure swing adsorption nitrogen making apparatus according to claim 5, wherein the third reversing valve (27) is respectively communicated with the insides of the plurality of refrigerating chambers through a plurality of mixed gas pipelines, and the plurality of mixed gas pipelines are all positioned at the lower ends of the refrigerating chambers corresponding to the mixed gas pipelines.
7. The refrigerator and freezer adopting vacuum pressure swing adsorption nitrogen making device according to claim 1, wherein a first check valve (28) and a second check valve (29) are respectively arranged on a pipeline of one air outlet of the two adsorption tanks (23), and the two adsorption tanks (23) are respectively communicated with the nitrogen bin (24) through the first check valve (28) and the second check valve (29).
8. The refrigerator or freezer employing a vacuum pressure swing adsorption nitrogen generating apparatus according to claim 1, wherein the vacuum pressure swing adsorption nitrogen generating apparatus (20) further comprises: an oxygen-enriched recovery tank (30),
the other air outlets of the two adsorption tanks (23) which are connected in parallel are respectively connected with the oxygen-enriched recovery tank (30) through two oxygen pipelines.
9. The refrigerator or freezer using vacuum pressure swing adsorption nitrogen generator according to claim 8, wherein a check valve (31) is provided on each of the two oxygen pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310156304.6A CN116164475A (en) | 2023-02-23 | 2023-02-23 | Refrigerator and freezer adopting vacuum pressure swing adsorption nitrogen making device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310156304.6A CN116164475A (en) | 2023-02-23 | 2023-02-23 | Refrigerator and freezer adopting vacuum pressure swing adsorption nitrogen making device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116164475A true CN116164475A (en) | 2023-05-26 |
Family
ID=86411101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310156304.6A Pending CN116164475A (en) | 2023-02-23 | 2023-02-23 | Refrigerator and freezer adopting vacuum pressure swing adsorption nitrogen making device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116164475A (en) |
-
2023
- 2023-02-23 CN CN202310156304.6A patent/CN116164475A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10966442B2 (en) | Refrigerator | |
| CN106705566B (en) | Fresh-keeping control method and device for refrigerating and freezing equipment | |
| CN115143677A (en) | Storage device | |
| CN113446800A (en) | Fresh-keeping device and refrigerator | |
| CN101322575A (en) | Oxygen concentration regulating device and photodegraded oxygen fresh-keeping refrigerator | |
| EP3473956B1 (en) | Refrigeration and freezing device | |
| CN107906827B (en) | Refrigerating and freezing equipment | |
| CN215605075U (en) | Oxygen control device and kitchen appliance | |
| CN215305120U (en) | Oxygen control device and kitchen appliance | |
| CN116164475A (en) | Refrigerator and freezer adopting vacuum pressure swing adsorption nitrogen making device | |
| US11559062B2 (en) | Inside air control apparatus and container refrigeration apparatus including the same | |
| CN106802047A (en) | Refrigerating device | |
| KR100672476B1 (en) | Vacuum storage device and refrigerator using the same | |
| CN106247731B (en) | Refrigerating and freezing device | |
| CN113446801B (en) | Controlled atmosphere preservation device, fruit and vegetable preservation method based on refrigerator, controller and refrigerator | |
| CN214199356U (en) | Deoxidization system in airtight space | |
| CN207462922U (en) | Oxygen device and refrigerator drop | |
| CN113446803B (en) | Controlled atmosphere preservation device, fruit and vegetable preservation method based on refrigerator, controller and refrigerator | |
| CN118816453A (en) | Air regulating mechanism, fresh-keeping drawer and refrigerator | |
| CN105923613B (en) | nitrogen-making device and refrigerator | |
| CN219889944U (en) | Refrigerator with a refrigerator body | |
| CN220292939U (en) | Fruit fresh-keeping device | |
| JP2731418B2 (en) | Storage device | |
| CN112556288A (en) | Deoxidization system in airtight space | |
| CN115507603A (en) | Nitrogen-making oxygen-collecting fresh-keeping refrigerator and fresh-keeping method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |